Apparatus for catching an end of a feed yarn in a pirn winder and the like



Aug. 11, 1970 ExzABu-Ro NEGlSHI 3,523,651

APPARATUS FOR CATCHING AN END OF A FEED YARN IN A PIRN WINDER AND THE LIKE Filed Oct. 16, 1967 v 2 Sheets-Sheet 1 I NVEN '1' UR.

H Ezlzauro Ne islw' J KZZWMM W Aug. 11, 1970 EIZABURO NEGISHI 3, ,6

APPARATUS FOR CATCH'ING AN END OF A FEED YARN IN A PIRN WINDER AND THE LIKE Flled Oct 16 1967 2 Sheets-$heet 2 INVENTOR. Eliza Zara A/e u's/w' WWW United States Patent Office 3,523,651 Patented Aug. 11, 1970 3,523,651 APPARATUS FOR CATCHING AN END OF A FEED YARN IN A PIRN WINDER AND THE LIKE Eizaburo Negishi, 9-3 Oaza-Nakazato, Yono-shi, Saitama-ken, Japan Continuation-impart of application Ser. No. 431,250, Feb. 9, 1965. This application Oct. 16, 1967, Ser. No. 675,686 Claims priority, application Japan, Feb. 28, 1964, 39/ 11,052; Apr. 19, 1964, 39/21,908 Int. Cl. B65h 54/14, 75/28 US. Cl. 242-27 1 Claim ABSTRACT OF THE DISCLOSURE An apparatus for catching an end of a feed yarn in a pirn winder and the like, which comprises a bobbin having a center hole and a yarn suction opening provided on the periphery of the bobbin at its end portion and communicating with said center hole, a bobbin supporting member provided with an air suction inlet which communicates with said center hole to form an air flowing duct therewith, and a yarn guide means for guiding an end of a feed yarn to a position near the said yarn suction opening at each starting of said bobbin to be Wound with the feed yarn, whereby upon starting of the bobbin, the said end of the feed yarn is sucked into the said center hole of the bobbin through said yarn suction opening by the air flow toward the said air suction inlet.

This application is a continuation-in-part ofv my application Ser. No. 431,250 filed on Feb. 9, 1965, now abandoned.

This invention relates to an apparatus for automatically catching a feed yarn in a pirn winder and the like. More particularly, it relates to an apparatus for catching an end of a feed yarn on an empty bobbin of a pirn winder and the like by sucking the end of the feed yarn toward a center hole of the bobbin by a stream of air, thereby to commence automatically winding of the feed yarn on the bobbin.

In the known methods of automatically catching an end of a feed yarn on an empty bobbin, a part of the feed yarn is pinched between a bobbin head and a bobbin supporting member which concentrically supports the bobbin and transmits rotary movement thereto, and the feed yarn is wound on the bobbin when the same starts rotating.

According to these conventional methods, a cutting device must be provided at some distance from the point where the feed yarn is pinched between the bobbin head and the bobbin supporting member, for cutting the connection with a previously wound cop. Because of said distance, a long tail end of the feed yarn is exposed over the surface of the cop and is also of such length that it often tangles with the unwinding feed yarn of the cop in the next step (for example, a weaving process), or some other disturbances occur. Therefore, in order to obviate such defects as described above, it is necessary to further cut the foot end yarn shorter or to wind it at a portion of the bobbin, and thus some additional apparatus is required to effect such operation. This situation is very disadvantageous because the construction or mechanism of a pirn winder and the like is made further complicated.

An object of the present invention is to provide an apparatus which overcomes the above-mentioned disadvantages of the known arrangements.

A further object of the present invention is to provide an apparatus for catching the end of the feed on a bobbin in a manner such that the tail end of the wound yarn is not exposed on a cop.

Other objects and features, and attendant advantages of the invention will become apparent to those skilled in the art from the following detailed description, taken in conjunction with the accompanying drawings wherein:

FIG. 1 is a fragmentary side-elevational and partly sectional view of the main part of apparatus according to the invention, in which a bobbin is newly placed so as to be started;

FIG. 2 shows the apparatus of FIG. 1 with yarn wound on a bobbin, in which a cop is formed;

FIG. 3 is a general view of a pirn winder provided with the apparatus as shown in FIG. 1;

FIG. 4 shows a modification of the pirn winder of FIG. 3 in which a yarn guiding member differing from that of FIG. 3 is used.

Referring to the drawings, a bobbin 1 is provided with a center hole 2 and an opening 3 communicating with said center hole 2, said opening being positioned near the base of said bobbin. The center hole 2 forms an air duct together with an air suction inlet 5 of a member 4 which supports the tail of the bobbin.

The center hole 2 may form an air duct together with an air suction inlet 5 of a head supporting member 4' which supports the head of the bobbin and transmits rotation to the bobbin. The head supporting member 4 is driven by a driving means M such as an electric motor and a gear device, said driving means being not shown in detail because it is conventionally known and not a characteristic element of the present invention.

When the bobbin 1 is rotated after removal of a previously wound cop, the air in the center hole 2 of the bobbin 1 is sucked into the air inlet 5 and the free end 6' of the feed yarn 6, guided by a yarn guide 7 and a horizontal pin 8' on a traverse guide 8 is drawn through the suction opening 3 into the center hole 2 as indicated by chain dotted line in FIG. 1. The traverse guide 8 is oscillated by a traverse mechanism which is not shown and is enclosed in a case N (in FIG. 3), said traverse mechanism being driven through a conventional traverse cam by the driving means M.

When the end of the feed yarn 6 is caught in the suction opening 3 and the bobbin 1 continues its rotation, the feed yarn 6 is wound on the outer surface of the bobbin 1. Accordingly, the yarn end 6' is maintained in the center hole 2 even after complete winding of the bobbin and is not exposed, whereby it becomes unnecessary to cut Off or wind in the exposed yarn end.

Referring particularly to FIG. 3; in the course of the above mentioned winding of the feed yarn 6, this yarn is afforded with a traverse oscillation by means of the traverse motion of the traverse guide 8, and this traverse guide 8 is transferred from the position A to B shown in FIG. 3 by means of a conventional device not shown which is driven by the riving means M, whereby a cop 9 such as shown in FIG. 2 is formed.

Referring to FIG. 3, when the traverse guide 8 is transferred to the position B, a supporting lever 21 which is pivotally supported by the movable case N and biased by a spring so as to turn clockwise is transferred from the position A to B.

Upon approach of the cop 9 to the desired complete form, inclined end 22' of a hook lever 22 which is pivotally supported by the case N abuts against a bolt 23, whereby the hook lever 22 is turned counterclockwise, and the other hook end 22" thereof is withdrawn from the lower end of the supporting lever 21. Upon withdrawal of the hook end 22 from the lever 21, the lever 21 is turned clockwise to the position 21', whereby an arm 10 hung from a pin 11 and having a tip guide 15 adapted to guide 3 the yarn 6. is pushed to the position by clockwise turning of the lever 21, and the tip guide is brought to the position 15', thus shifting the yarn 6 to the position 6', whereby the tip bunch 12 is formed. Upon formation of said tip bunch 12, the bobbin is stopped by manual operation or any other operation. For this purpose, it is possible to provide a limit switch which is operated, at the extreme rightward position of the hook lever 22, traverse guide 8 or arm 10, so as to stop the driving mechanism for the bobbin 1. Furthermore, immediately after the formation of the tip bunch 12, the traverse guide 8 is transferred from the position B to the position A. As shown particularly in FIG. 2, scissors 13 supported on a support 16 are provided to cut the feed yarn 6 above the tip bunch 12 after stopping of the bobbin 1. When the feed yarn 6 is cut as described above, the free end 14 of the tip bunch 12 is formed.

When the traverse guide 8 is restored to its starting position as shown in FIG. 1, the leading end of the feed yarn returns together with the tip guide 15 to the said starting position. At this time, the yarn 6 is caused to adhere to the tip guide 15 by static electricity generated by friction between the feed yarn 6 and the tip guide 15 during formation of the tip bunch 12, or a napped cloth may be provided on the tip guide 15 for this purpose.

At the starting positions of the various members, the cop is released and dropped in the known manner, and then another bobbin 1 is placed in position, as shown in FIG. 1, and the yarn winding cycle is repeated.

In place of the above-mentioned arm 10 having the tip guide 15, another yarn guide device utilizing air flow may be adopted. This yarn guide device is illustrated in FIG. 4, in which the same members as those in FIG. 3 are designated by the same numerals and characters.

Referring to FIG. 4, the yarn guide device L comprises an air pipe 17 filled with compressed air, a guide pipe 18 communicating with said pipe, an outer case L enclosing said members 17 and 18 therein, an inner funnelshaped pipe 19, and an outer funnel-shaped pipe 20, an inner guide hole of said guide pipe 18 being opened at the space between said inner and outer pipes 19, and said device L being supported by the supporting lever 21. The feed yarn 6 passed through the pipes 19 and 20 is drawn down towards the opening 3 of the bobbin 1 by the compressed air blown out from the space between said pipes 19 and 20, whereby the feed yarn 6 is guided to the yarn sucking opening 3.

Operation of the apparatus illustrated in FIG. 4 is substantially the same as in the case of the apparatus illustrated in FIG. 3.

It will be apparent that various modifications and alternatives may be adopted within the scope and spirit of the invention, and that the above-mentioned embodiments of the invention are merely given for the purpose of illustration. Accordingly, it will be understood that the invention is not limited to the specific embodiments illustrated herein.

What is claimed is:

1. An apparatus for catching an end of a feed yarn in a pirn winder and the like, which comprises a bobbin having a center hole and a yarn suction opening communicating with said center hole and provided on the periphery of the bobbin at a position near an end of the bobbin, a bobbin supporting member having an air suction inlet positioned to form an air duct with said hole for sucking the air from said suction opening of the bobbin through said center hole thereof, and yarn guide means for guiding the free end of the feed yarn to the position of said suction opening at the start of rotation of the bobbin thereby to suck in and catch positively said yarn end in the center hole of the bobbin.

References Cited UNITED STATES PATENTS 2,302,715 11/ 1942 Reynolds et a1. 24232 2,670,147 2/1954 Joyce 24227 2,692,089 10/ 1954 Siegenthaler 242-27 2,718,360 9/1955 Joyce 24227 2,763,443 9/1956 Goodhue et al. 242-27 2,827,243 3/1958 Cadle 242-27 X 3,216,667 11/1965 Niederer 24227 FOREIGN PATENTS 1,284,093 1/1962 France.

STANLEY N. GILREATH, Primary Examiner U.S. Cl. X.R. 242125.1 

